This listing is for 4 Pelican 1630 / 1640 / 1650 replacement wheels. These are made by Pelican and will fit the 1630 case, 1640 case, or the 1650 case.  Pictures are examples of the wheels. Pelican org. wheels. Wheel size - approx. - 2" diameter  x 1.25" width.  This listing is for 4 wheels total. These are designed to fit the newest versions of all these cases.